No sooner does man discover intelligence than he tries to involve it in his own stupidity.

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From birth man carries the weight of gravity on his shoulders. He is bolted to earth. But man has only to sink beneath the surface and he is free.

Mankind has probably done more damage to the Earth in the 20th century, than in all of previous human history.

Water and air, the two essential fluids on which all life depends, have become global garbage cans.

I am not a scientist. I am rather an impresario of scientists.

Any fool can know. The point is to understand.

The more pity that fools may not speak wisely what wise men do foolishly.

Lord, what fools these mortals be!

Discipline divorced from wisdom is not true discipline, but merely the meaningless following of custom, which is only a disguise for stupidity.